Adjustable measuring and cutting device for coil-winding machines



Aug. 14, 1928. 1,680,489

s. WADSTEN ADJUSTABLE MEASURING AND CUTTING DEVICE FOR COIL WINDING MACHINES Filed Feb. 4, 1927 2 Sheets-$heet 1 s1 (@fss INVENTOR STN WAOSTE/V ATTORNEY Aug. 14', 1928. 1,680,489

S. WADSTEN ADJUSTABLE MEASURING ANDYCUTTING DEVICE FOR COIL WINDING MACHINES Filed Feb. 4, 1927 2 snees-sheet 2 FIG. 2,.

INVENTOR s TEN WA 05 TN Patented Aug. 14,1928. i p I 1,680,489

UNITED STATES PATENT oFFica.

STEN WADS'IIIIJN, F BLOOMFIELD, NEN JERSEY. ASSIGNQR To WESTINGHOUSE LAMP COMPANY, CORPORATION OF PENNSYLVANIA. I

aniusrannn MEASURING Ann CUTTING DEVICE non corn-wrnnrne MACHINES.

Application filed February 4, 1927. Serial No. 165,857.

This invention relates to improvements in and the length of the amount of wire in the Tfifltil'llntS for coiling filamentwire and more coiled section will differ. Under these con- 55 particularly to a. machine of such. type' op-' dltions, it has heretofore been necessary to cratin in the absence of a mandrel as shown substitute another measuring drum of the 5 and described in co-pending application proper circumference to. accommodate the Serial No.'121,156, filed July 8, 1926,:1nd variation in the ratingdata.

assigned to the same asslgnee as is the pres- An object of the present invention is, 60 g mventlon, therefore, to facilitate the admstment of a The machine disclosed in the said co-pendcoil winding machine forthe product-ion of ing application above referred to provides coiled sections containing different lengthsv for the coiling of a fine filamentary wire to of Wire. produce a helical body capable of useas A further object of the, inventionis to an incandescent electric lamp filament. In provide a coil winding machine with cothe operation of the said machine a wire is ordinating machine elements so arranged fed endwise into a cavity die from which it as to be expeditiously adjusted to quickly emerges in a series of successive convolu' and conveniently adapt the machine for the tions. The coiling operation is continuous production of coiled sections of different. 70 and a. filamentary body of indefinite length lengths. p I may b pyoduged Other objects and advantagesof the in- An important step in the manufacture of vention will be understood as the description coiled lamp filaments, however, consists in proceeds. producing sections of coiled wire of a prethe attainment of the desired result, 7 determined and uniform length. In the a coil winding machine may be-providetl above mentioned application, mechanism is with a drum or measuring wheel of a given shown and described for producing coiled diameter. The wheel' may be rotatedby.

sections containing given lengths of wire fr ctional engagement with a bight of the and means are also rovided for controlling moving wire so that a movement of the wire .80 the amount or lengti of wire in each section about the periphery of the wheel may be so that a multiplicity of sections of exactly utilized and so applied that upon a given the same length may be produced so that the travel of a predetermined point in the wire,

section will contain uniform lengths of wire means will operateito sever the wire. In

so as to produce filaments of uniform given some cases, it may be desirable to sever a electrical resistance. length of filament equal to a given portion This is accomplished by providing the said of the circumference of the wheel and for machine with a. measuring wheel or drum this purpose mechanism is so arranged that around which the filament or wire passes upon a given movement of a point in the peseveral times on its way to the die for the riphery of the measuring wheel, means are coiling operation. The drum is so arranged brought into operation to sever awire.- In

that upon a complete revolution thereof, accomplishing this result, the measuring 40 mechanism is operated to sever a section of Wheel is provided with means for transmit coiled wire, the said section containing a ting movement to acutter actuating member length of wire equal tothe circumference of upon any predetermined degree of movethe drum. From this it will be evident that ment of the measuring wheel. This means I a. machine may be provided with a drum for may comprise a pinion rotatable with the producing coiled sections of a given length. measuring wheel and adapted to engage with The sections thus produced obviously 0011- an intermediate or idler gear wheel in mesh tain lengths of wire useful in lamps of a with a pinion rotatable with a cammember '100 given rating, thatis, the lamp filament for which actuate's the wirecutting mechanism.

a 60 watt, volt lamp must contain a By reason of thisgear train n' otiontrains- 50 length of wire of 517 mm. and in accordance mitting means, itvis possible to actuate the with the operation of the machine. If a cam upon any given relation to the degree lamp filament of another wattage is desired, of movement of the measuring wheel and to 10 y it is evident that the rating data. will vary cause the actuation of the cam with respect to the degree of movement of the said measuring wheel. This relation may be changed by a change in the ratio between the said gears.

The invention will be more fully understood by reference to the accompanying drawing in which:

Fig. l is a perspective View of the present cutter actuating mechanism;

Fig. 2 is a diagrammatic or skeleton View of the cutter actuating elements showing the motion transmitting means between the cutter and said elements; and

Fig. 3 is a vertical sectional view showing the cutting device.

The present invention as illustrated, is applied to a coil winding machine as shown in the above mentioned co-pending application and may comprise a measuring wheel 10 secured to one end of and rotatable with a shaft 11, journaled' in a bearing 12 of a bearing bracket 13. The bearing bracket may be provided with a foot 11 for attach-' ment to a table or suitable supporting structure. The opposite end of the shaft 11 may be provided with a pinion 15 disposed for. engagement with a gear wheel 16 constitutin an idler, carried upon an arm 17 of a rocka le-member 18 pivoted at 19 on the bracket 13.

The member 18 may be provided with a depending arm 21 having an arcuate slot 22 through which a stud 23 fastened in the bracket 13, extends, the stud being provided with a suitable nut to lock the arm and consequently the rockable-member 18 in a given position.

A rotation of the measuring wheel 10 will obviously cause a rotation of the gear wheel 16 which latter may be disposed in mesh with a pinion 24 secured to one end of a shaft 25, journaled in a'bearing 26 integral with the bracket 13. The opposite end of the shaft 25 may be provided with a cam 27 so that a rotation of the 'pinion 24: causes a rotation of the cam. This cam member is provided with a drop portion 28 and is engageable with a lever arm 29 which actuates cutting mechanism to be presently described. i

A rotation of the measuring wheel 10 in the direction of the arrow X will result in the transmission of motion through the gearing 15, 16 and 2 1 torotate the cam 27 in the direction of the arrow Y to actuate the lever 29 which in turn transmits motion to wire severing mechanism. It will be evident that the drop portion 28 of the cam 27 will be moved to actuate the lever 29 upon a given degree of rotation of the measuring wheel 10 according to the ratio between the gears 15 and 24 as will be here inafter more fully explained.

If it is desirable toactuate the cutting mechanism to sever sections of wire of a given length, the gear wheel 24 may be removed and another substituted therefor of a different pitch diameter. This may be readily accomplished since the idler gear wheel 16 is mounted on the rockable arm 18 and may be oscillated to or from engage ment with the pinions associated with the measuring drum and the cam in addition to the oscillatory movement of the idler 16 the same is movable along the arm by reason of a slot 31.

In the type of machine to which the present invention is applied, a wire 32 may be lead from a spool or other source of supply 33, thence around the drum 10 and between driving rollers 53% and 35. The driving rollers are rotated by a suitable source of power (not shown), such mechanism being fully set forth in the above mentioned co-pending application. After passing between the driving rollers, the wire is directed into a die 36 from which it issues in the form of a coil 37 which is subsequently severed into sections of a given length for use as a lamp filament.

In the making of this lamp filament, it is necessary that each filament length be cut to a given dimension, for example, in order to produce a coiled filament for a watt lamp, it is necessary to employ a wire having a diameter of .00187' inch and to coil the wire into a helix containing 398 turns per inch and severed coiled filaments must each contain a length of wire of 517 mm. so as to afford the required electrical resistance. Ordinarily a machine for winding these coiled filamentary sections may be supplied with. a drum having a diameter exactly equal to the length of the filament wire in a coiled section, such section being severed upon a complete rotation of the drum.

In the manufacture of incandescent lamps, however, there are many types of lamps, that is, the wattage varies and the difl'erent types require coiled sections of different lengths. In changing from one wattage to another, it was, therefore, necessary to change the measuring wheel or drum and inasmuch as the variety of lamps is extensive, it was of some inconvenience to provide the necessary number of different diameter wheels. Furthermore, in some types of lamps, the coiled section is of such a length as to require a drum of an exceptionally large size, thus making it impossible without considerable modification and adjustment to provide a drum for measuring such a filament section. In addition to the adjustment, it will be obvious that when changing the drum the line of travel of the filament from the drum to the coiling die will be changed andadjustment is often necessary in this portion of the mechanism.

In the present invention the employment of indirect transmission of motion from the measuring drum to the cutting mechanism makes it possible to greatly reduce the num ber of drums required. For example, a drum for a given wattage lamp may be employed and the gear wheel 24 may be changed so as to so actuate the cam 27 that a section of filament will be severed of a given length, then without changing the drum, another gear may be substituted to produce a filament section of another length.

It may be stated that the length of tila ment in a coiled section is to the diameter of the drum 10 as the pitch diameter of gea r wheel 15 is to gear wheel If for instance a drum of 600 nnn. diameter employed and a filament length of 100 mm. required then gears 2a and 15 may have 22 and 132 teeth respectively. If the gears are reversed, then the opposite condition will occur that is, a filament length of 3600 mm. may be produced.

It will 'hus be evident that by variation in the ratio of the pitch diameters of the gears, the lengths of the severed coiled sections may be varied. The accuracy attained is, however, not dependent upon a secondary transmission of motion since the prime mover of the drum is the wire to be measured and the present mechanism utilizes a movement of a portion of the wire a predeter mined distance in combination with mechanism to sever wire into uniform lengths in accordance with the wattage of the particular type of lamp for which the filament is to be used.

The mechanism for severing the coiled sections may be the same as that shown in the co-pending application and as illustrated in Fig. 2 includes the lever 29 pivoted at 38, an end 39 of this arm is normally held against the cam 27. A spring 41 and set screw 42 being provided to regulate the degree of movement of the arm. The spring 41 may have one end secured to the lower end 43 of the lever 29 and the opposite end secured to a bracket integral with a stationary portion of the machine. The .lever when actuated by the cam 27 engageswith a trigger-member 45 normally held against a stop pin 46 by a spring l6 and pivoted at 47 on one end of a lever 4-8 which is pivoted at 49 in the bracket 44. the lever 48 is provided with a projection 52 engageable with a slide-bar 53 of a coil severing device 54. This device may consist of an L-shaped member 55 suitably secured to the machine, one arm 56 thereof may be in the form of a casing or guidefor the slide-bar 53 (see Fig. 3). This slide-bar carries a cutter member 57 movable across an aperture 58 at the upper end of the arm 56 through which the coiled wire 37 passes after leaving the die 36. The edge of the aperture 58 in conjunction with the cutter 57 serves to sever the coiled wire upon An end 51 of a movement of the cutter. The cutter 57. is normally maintained in its lower position by a spring 59 and operates to sever a coiled section when motion is transmitted thereto from the lever 48. lVhen the cam 27 is rotated, the end 39 o the lever 29 drops and the end 43 thereof is moved outwardly causing the trigger-1min ber 15 to move and permit the said end to pass. WVhen the drop portion 28 permits the end 39 of the lever 29 to return toward the cam, the end id of said lever engages the trigger-member l5, which is relatively immovable by reason of the stop pin 46, cansing a downward movement of the adjacent lever 58 with theresult that the end 51 thereof moves upwardly to actuate the slide-bar 53 andsever a coiled section. This operation is, of course, repeated with each rotation of the cam.

For the purpose of preventing the end 39 of the lever 29 from imposing a severe impact upon the cam 27, a set screw 60 is provided to engage with the end of the lever 29. This set screw serves to prevent wear which would operate to change the strokeand cause a. variation in the length of the severed coil. This is particularly true when an anti-friction roller 15 employed at the end 39 of the lever 29 since if a flat portion were produced upon the roller, the drop may occur prematurely.

The present invention, therefore, makes it possible to produce coiled filamentary bodies of different lengths without alteration to the coil winding machine other than the convenient replacement and adjustment of the motion transmitting elements.

Although a. preferred embodiment of the invention is shown and described herein, it is to be understood that modifications may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

WVhat is claimed is:

1. A machine for producing coiled filaments for incandescent electric lamps of different wattages comprising means for feeding a wire, a measuring drum movable through contact with said wire, means for coiling the wire after passing said drum,'a cutter disposed in operable relation with said coiled wire, means associated with said lou drum for actuating the cutter upon a pre- 7 determined movement of said drum to sever a coiled filament for a given wattage and means for changing the relative movement between said cutter and drum to cut a coiled filament for a. difierent wattage lamp.

2. A machine for producing coiled filaments for incandescent electric lamps of different wattages comprising means for feeding a wire, a measuring drum movable through frictional engagement with said moving wire, means for coiling the wire passing from said drum, a cutter for severing said coiled wire, a lever for actuating said cutter, a cam member disposed in 0perable relation to said lever, a gear wheel for rotating said cam, another gear wheel rotatable with said drum and means for transferring motion from one gear to another to actuate said cam upon a predetermined movcment of said drum.

3. A machine for producing coiled filaments for incandescent electric lamps of different wattages comprising means for feeding a wire, a measuring drum movable through frictional engagement with said moving wire, means for coiling the wire passing fron'i said drum, a cutter for sever ing said coiled wire, a lever for actuating said cutter, a cam member disposed in operable relation to said lever, a gear wheel for rotating said cam, rotatable with said drum, an idler gear for transferring motion .from one gear to another, said first mentioned gears being interchangeable to cause variation between the operation of the said lever and the movement of the drum to cut coils for lamps of different wattage.

4. A machine for producing coiled filaments for incandescent lamps of given wattages comprising means for moving a wire, a drum movable through engagement with said wire, a wire cutter, means for actuating another gear wheel said cutter upon a given degree of movement of said drum, means for coiling said wire and means for adjusting the time relation between the actuation of said cutter and the movement of said drum to sever a section of coiled filament for a lamp of a given Wattage.

5. A machine for producing coiled filaments for incandescent lamps of different wattages comprising means for moving a wire, means for coiling said wire to helical form, a wire cutter and means for actuating said cutter upon a predetermined degree of movement of said wire and means for adjusting said second mentioned means to actuate said cutter upon a different degree of movement of said wire.

(3. A machine for producing coiled filaments for incandescent lamps of different wattagcs comprising means for moving a wire, means for coiling said wire to helical form, a coil severing device, means actuated by said moving wire for operating said coil severing device and means for adjusting said last mentioned means to actuate said severing device upon a different degree of movement of said wire.

In testimony whereof, I have hereunto subscribed my name this 3rd day of February, 1927.

STEN WADSTEN. 

